March 20, 2017 Cover
Volume 95, Issue 12
Last year, NIH implemented a policy to push scientists to consider how sex affects biological systems. Critics worry it goes too far.
An extract from tree bark increases the strength of the tooth material dentin, potentially helping dental fillings last longer
Rule is intended to protect communities and workers from accidents
Chemiluminescent reagents help track activity in cells
Norman Ohler describes how drug use among German soldiers and Hitler himself affected WWII